Ford 1997 Aerostar Manual page 16

Electronic 4-wheel drive warning light
Charging System Light
This light indicates that your battery is not being
charged and that you need to have the electrical
system checked.
Charging system light
This light illuminates every time you turn the
ignition to the ON or START position (engine
off). The light should go off when the engine
starts and the alternator begins to charge.
If the light stays on or illuminates when the
engine is running, have the electrical system
checked as soon as possible.
Supplemental Air Bag Readiness Light and
Tone Generator
This light illuminates for six seconds when the
ignition is turned to the ON position. If the light
fails to illuminate, continues to flash, remains on,
or if a series of five beeps is heard, have the
system serviced as soon as possible.
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